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TECHNICAL PAPERS

Analysis of the Flow Through a Vented Automotive Brake Rotor

[+] Author and Article Information
David A. Johnson, Bryan A. Sperandei, Ross Gilbert

Department of Mechanical Engineering, University of Waterloo, Waterloo, ON N2L 3G1 Canada

J. Fluids Eng 125(6), 979-986 (Jan 12, 2004) (8 pages) doi:10.1115/1.1624426 History: Received October 01, 2001; Revised June 04, 2003; Online January 12, 2004
Copyright © 2003 by ASME
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References

Limpert, R., 1975, “Cooling Analysis of Disc Brake Rotors,” SAE Paper No. 751014.
Sisson, A. E., 1978, “Thermal Analysis of Vented Brake Rotors,” SAE Paper No. 780352.
Hudson, M. D., and Ruhl, R. L., 1997, “Ventilated Brake Rotor Air Flow Investigation,” SAE Paper No. 971033.
Jerhamre, A., and Bergstrom, C., 2001, “Numerical Study of Brake Disc Cooling Accounting for Both Aerodynamic Drag Force and Cooling Efficiency,” SAE Paper No. 2001-01-0948.
Paone,  N., Riethmuller,  M. L., and Van den Braembussche,  R. A., 1989, “Experimental Investigation of the Flow in a Vaneless Diffuser of a Centrifugal Pump by Particle Image Displacement Velocimetry,” Exp. Fluids, 7, pp. 371–378.
Shepherd,  I. C., and La Fontaine,  R. F., 1993, “Mapping the Velocity Field in a Centrifugal Fan Using Particle Image Velocimetry,” J. Wind. Eng. Ind. Aerodyn., 50, pp. 373–382.
Shepherd, I. C., La Fontaine, R. F., Welch, L. W., and Downie, R. J., 1994, “Velocity Measurement in Fan Rotors Using Particle Image Velocimetry,” Laser Anemometry, ASME, New York, FED-Vol. 191, pp. 179–183.
Akin,  O., and Rockwell,  D., 1994, “Flow Structure in a Radial Flow Pumping System Using High Image Density Particle Image Velocimetry,” ASME J. Fluids Eng., 116, pp. 538–544.
Adrian,  R. J., 1991, “Particle-Imaging Techniques for Experimental Fluid Mechanics,” Annu. Rev. Fluid Mech., 23, pp. 261–304.
Grant,  I., 1997, “Particle Image Velocimetry: A Review,” Proc. Inst. Mech. Eng., Part C: J. Mech. Eng. Sci., 211, pp. 55–76.
Melling,  A., 1997, “Tracer Particles and Seeding for Particle Image Velocimetry,” Meas. Sci. Technol., 8, pp. 1406–1416.
Gilbert, R., 2001, “Evaluation of FFT Based Cross-Correlation Techniques Used in Particle Image Velocimetry,” M.A.Sc. thesis, University of Waterloo, Waterloo, Canada.
Scarano,  F., and Riethmuller,  M. L., 1999, “Iterative Multigrid Approach in PIV Image Processing With Discrete Window Offset,” Exp. Fluids, 26, pp. 512–523.
Willert,  C. E., and Gharib,  M., 1991, “Digital Particle Image Velocimetry,” Exp. Fluids, 10, pp. 181–193.
Prasad,  A. K., Adrian,  R. J., Landreth,  C. C., and Offutt,  P. W., 1992, “Effect of Resolution on the Speed and Accuracy of Particle Image Velocimetry Interrogation,” Exp. Fluids, 13, pp. 105–116.
Westerweel,  J., 1997, “Fundamentals of Digital Particle Image Velocimetry,” Meas. Sci. Technol., 8, pp. 1379–1392.
Westerweel,  J., 2000, “Theoretical Analysis of the Measurement Precision in Particle Image Velocimetry,” Exp. Fluids, (Suppl.),pp. S3–S12.
Rothe,  P. H., and Johnston,  J. P., 1976, “Effects of System Rotation on the Performance of Two-Dimensional Diffusers,” ASME J. Fluids Eng., 9, pp. 422–430.

Figures

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Vented rotor showing sections removed for internal PIV measurements
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Photograph of a typical front wheel automotive assembly excluding the rim and tire
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Orientation of the laser and camera for X-Y plane PIV measurements
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Absolute mean velocity plot of the inlet flow (X-Z plane at Y*=0), N=684 rpm, dimensionless velocity vector=0.1, contours of isovelocity 0.008 dimensionless velocity units, direction of rotation is out of the page
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Absolute mean velocity plot of the inlet flow (X-Y plane at Z*=0.1), N=684 rpm, dimensionless velocity vector=0.3
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Relative mean velocity plot of the inlet flow (X-Y plane at Z*=0.1), N=684 rpm, dimensionless velocity vector=0.4
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(a) (Top) relative mean velocity vector plot of the internal flow (X-Y plane at Z*=0), N=684 rpm, dimensionless velocity vector=1.0. (b) (Bottom) relative mean velocity contour plot of the internal flow (X-Y plane at Z*=0), N=684 rpm.
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Absolute mean velocity plot of the exit flow (X-Y plane at Z*=0, triggered), N=684 rpm, dimensionless velocity vector=1.0. Contours of isovelocity 0.08 dimensionless velocity units.
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Absolute mean velocity plot of the exit flow (X-Y plane at Z*=0, untriggered), N=684 rpm, dimensionless velocity vector=1.0. Contours of isovelocity 0.08 dimensionless velocity units.
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Absolute mean velocity plot of the exit flow (X-Z plane at Y*=0), N=684 rpm, dimensionless velocity vector=0.3. Contours of isovelocity 0.05 dimensionless velocity units.
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Absolute mean velocity plot of the exit flow (X-Z plane at Y*=0, single instantaneous vector map), N=684 rpm, dimensionless velocity vector=0.3
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Nondimensionalized turbulent kinetic energy plot of the internal flow (X-Y plane at Z*=0), N=684 rpm
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Inlet velocity profile used to calculate the mass flow entering the rotor, N=684 rpm. Rotation out of the page. Dimensionless velocity vector=0.1.
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Exit velocity profile used to calculate the mass flow exiting the rotor, N=684 rpm. Dimensionless velocity vector=0.3.
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High resolution vector plot of internal flow (pressure side vectors removed for clarity), N=684 rpm. Dimensionless velocity vector=0.2.
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Relationship between the maximum exit flow velocities and the rotational speed of the rotor

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